143121442 has 8 divisors (see below), whose sum is σ = 214750800. Its totient is φ = 71537844.

The previous prime is 143121431. The next prime is 143121481. The reversal of 143121442 is 244121341.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2092 + ... + 17047.

It is an arithmetic number, because the mean of its divisors is an integer number (26843850).

Almost surely, 2^143121442 is an apocalyptic number.

143121442 is a deficient number, since it is larger than the sum of its proper divisors (71629358).

143121442 is a wasteful number, since it uses less digits than its factorization.

143121442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22880.

The product of its digits is 768, while the sum is 22.

The square root of 143121442 is about 11963.3374106058. The cubic root of 143121442 is about 523.0801437529.

Adding to 143121442 its reverse (244121341), we get a palindrome (387242783).

The spelling of 143121442 in words is "one hundred forty-three million, one hundred twenty-one thousand, four hundred forty-two".